4-40 x 3/8 screw
Volume Control Nut
Instructions for FAA Form 337
The ITC-404SP can usually receive an airworthiness approval by submitting the FAA form 337,
Major Repair and Alteration
(Airframe, Power plant, Propeller or Appliance) . For the ITC-404SP, the following text can be used as a guide.
1. Installed FlightTech ITC-404SP Panel Mount Intercom, as per the manufactures instructions provided by the manufac-
turer, DesignTech Systems.
2. Installed intercom unit (location in instrument panel) in plane sight of the pilot and connected to the avionics buss
through a 1 Amp fuse. Jacks were installed on each side (location). Push-To-Talk buttons installed (locations).
3. This unit has a fail-safe feature built-in, in the event of a power failure to the intercom, the pilots headset can be con-
nected directly to the radio headphone input and microphone.
4. All work was done in accordance with manufacturer’s instructions, FAR43, AC43.13-1B Chapter 11 (Electrical Systems), Sec-
tion 5 (electrical wire rating), Section 6 (aircraft electrical wire selection), Section 7 (table of acceptable wires), Section 8
(wiring installation requirements), Section 9 (environment protection and inspection), Section 11 (clamping), Section 12
(wire insulation and lacing string tie), Section 13 (splicing), Section 15 (grounding and bonding), Section 17 (connectors),
AC43.13-2A Chapter 2 (Radio Installations).
5 Weight and Balance/Equipment list was amended.
6 Instructions for continued airworthiness: Annual visual and operational inspection as per AC43.13-1B, Chapter 12, Section 1,
-1 (Avionics equipment maintenance), 12-9a (inspection of avionics systems).
7
2.5 mm Cellular Phone jack.
Pin 1, Mic to J3-1
Pin 2, Audio to J3-2
Pin 3, shield to J3-3
Microphone and Stereo Headphone Jack
Summary of Contents for ITC-404SP
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